1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf142c34261bdddc1d97bec31860564f0b593db7c40fe335aa197bd6b0755f508. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/367f4c9f-eb0d-4eaf-94e4-9ee26188d1eb.json and https://artists.proofprofile.net/proofs/artist/367f4c9f-eb0d-4eaf-94e4-9ee26188d1eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15aef852df23ff2ca946ef88b1a74daf040545bdec884acc946453cead8bf41. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:20:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323df483837f1d413212ea161bfd3bd7228c47e30321a551e224adc75dfd55df. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:27:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92471112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63cb8eb5465054345ce20fa63816a8bff8453f7d17830118de1d45cf78ff699. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2400620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60465059c4f1e8710d83ed14e8bc227ef606cf1be0087a75c047d37bfc8de253. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EX2432486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c12a61c30553effb041fd9dcdaeafe8a3ec5ba1fac8820467515ab3cbd8366. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2558634.